| Bridge Name: | Ironworkers Memorial Second Narrows Bridge |
| Official Name: | Ironworkers Memorial Second Narrows Crossing |
| Carries: | Six lanes of British Columbia Highway 1, pedestrians and bicycles |
| Crosses: | Burrard Inlet |
| Locale: | Vancouver District of North Vancouver |
| Owner: | British Columbia Ministry of Transportation and Infrastructure |
| Design: | Truss/cantilever bridge |
| Designer: | Swan, Wooster and Partners |
| Material: | Steel |
| Begin: | 1957 |
| Builder: | Peter Kiewet and Sons, Raymond International,[1] and Dominion Bridge Company[2] |
| Open: | August 25, 1960 |
| Coordinates: | 49.2953°N -123.0263°W |
| Traffic: | 121,778 (2021)[3] |
The Ironworkers Memorial Second Narrows Crossing, also called the Ironworkers Memorial Bridge and Second Narrows Bridge, is the second bridge constructed at the Second (east) Narrows of Burrard Inlet in Vancouver, British Columbia, Canada. Originally named the Second Narrows Bridge, it connects Vancouver to the North Shore of Burrard Inlet, which includes the District of North Vancouver, the City of North Vancouver, and West Vancouver. It was constructed adjacent to the older Second Narrows Bridge, which is now exclusively a rail bridge. Its construction, from 1956 to 1960, was marred by a multi-death collapse on June 17, 1958. The First Narrows Bridge, better known as Lions Gate Bridge, crosses Burrard Inlet about west of the Second Narrows.
The bridge is a steel truss cantilever bridge, designed by Swan Wooster Engineering Co. Ltd. Construction began in November 1957, and the bridge was officially opened on August 25, 1960. It cost approximately $23 million to build.[4] Tolls were charged until April 1, 1963.[5]
The bridge is long with a centre span of . It is part of the Trans-Canada Highway (Highway 1).
On June 17, 1958, as a crane stretched from the north side of the new bridge to join the two chords of the unfinished arch, several spans collapsed. Seventy-nine workers plunged into the water. Eighteen were killed either instantly or shortly thereafter, possibly drowned by their heavy tool belts. A diver searching for bodies drowned later, bringing the total fatalities for the collapse to nineteen. In a subsequent Royal Commission inquiry, the bridge collapse was attributed to miscalculation by bridge engineers. A temporary arm, holding the fifth anchor span, was deemed too light to bear the weight.[6]
In December 1957, a safety inspector from the British Columbia Workmen's Compensation Board had reported that the installation of a safety net under the work platforms was "impracticable" following the death of another steelworker.[7]
The bridge was renamed the "Ironworkers Memorial Second Narrows Crossing" on June 17, 1994, to honour the eighteen workers who died in the collapse, along with one rescue diver and four other workers who also died during the construction process.[8] [9]